我创建了一个 subview Controller ,如下所示。它有一个 UIImageView
。我将 UIImageView
添加到 View 中,如下所示。
class SampleChildViewController : UIViewController {
let imageView : UIImageView = {
let imageview = UIImageView()
imageview.translatesAutoresizingMaskIntoConstraints = false
imageview.clipsToBounds = true
imageview.contentMode = .scaleAspectFit
imageview.image = UIImage(named: "cat")
return imageview
}()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(imageView)
NSLayoutConstraint.activate([
imageView.topAnchor.constraint(equalTo: view.topAnchor),
imageView.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 10),
imageView.widthAnchor.constraint(equalToConstant: 150),
imageView.heightAnchor.constraint(equalToConstant: 150)
])
}
}
这是父 View Controller 的样子。
class ViewController: UIViewController {
let child : SampleChildViewController = SampleChildViewController()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.red
child.view.translatesAutoresizingMaskIntoConstraints = false
addChild(child)
child.didMove(toParent: self)
view.addSubview(child.view)
NSLayoutConstraint.activate([
child.view.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 8),
child.view.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: 8),
child.view.leftAnchor.constraint(equalTo: view.leftAnchor),
child.view.rightAnchor.constraint(equalTo: view.rightAnchor),
])
}
}
现在的问题是我的 imageview 有一个奇怪的上边距,如下所示。如何解决?
最佳答案
imageview.contentMode = .scaleAspectFit
有问题。您看到的图像边界不是真正的边界。将内容模式设置为 imageview.contentMode = .scaleAspectFill
因为它将填充整个 View 。
它应该看起来像下面的东西
let imageView : UIImageView = {
let imageview = UIImageView()
imageview.translatesAutoresizingMaskIntoConstraints = false
imageview.clipsToBounds = true
imageview.contentMode = .scaleAspectFill
imageview.image = UIImage(named: "cat")
return imageview
}()
关于ios - 从 ChildViewController 添加的 ImageView 中的特殊上边距,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52799310/